English verb conjugation
MUST DECELERATE

Regular verb: decelerate - decelerated - decelerated

Affirmation

Simple form	V-ing form
I must decelerate you must decelerate she must decelerate we must decelerate you must decelerate they must decelerate	I must be decelerating you must be decelerating she must be decelerating we must be decelerating you must be decelerating they must be decelerating
Perfect	V-ing perfect
I must have decelerated you must have decelerated she must have decelerated we must have decelerated you must have decelerated they must have decelerated	I must have been decelerating you must have been decelerating she must have been decelerating we must have been decelerating you must have been decelerating they must have been decelerating

Negation

Simple form	V-ing form
I mustn't decelerate you mustn't decelerate she mustn't decelerate we mustn't decelerate you mustn't decelerate they mustn't decelerate	I mustn't be decelerating you mustn't be decelerating she mustn't be decelerating we mustn't be decelerating you mustn't be decelerating they mustn't be decelerating
Perfect	V-ing perfect
I mustn't have decelerated you mustn't have decelerated she mustn't have decelerated we mustn't have decelerated you mustn't have decelerated they mustn't have decelerated	I mustn't have been decelerating you mustn't have been decelerating she mustn't have been decelerating we mustn't have been decelerating you mustn't have been decelerating they mustn't have been decelerating

Interrogative form

Simple form	V-ing form
must I decelerate? must you decelerate? must she decelerate? must we decelerate? must you decelerate? must they decelerate?	must I be decelerating? must you be decelerating? must she be decelerating? must we be decelerating? must you be decelerating? must they be decelerating?
Perfect	V-ing perfect
must I have decelerated? must you have decelerated? must she have decelerated? must we have decelerated? must you have decelerated? must they have decelerated?	must I have been decelerating? must you have been decelerating? must she have been decelerating? must we have been decelerating? must you have been decelerating? must they have been decelerating?

Interro-negative form

Simple form	V-ing form
mustn't I decelerate? mustn't you decelerate? mustn't she decelerate? mustn't we decelerate? mustn't you decelerate? mustn't they decelerate?	mustn't I be decelerating? mustn't you be decelerating? mustn't she be decelerating? mustn't we be decelerating? mustn't you be decelerating? mustn't they be decelerating?
Perfect	V-ing perfect
mustn't I have decelerated? mustn't you have decelerated? mustn't she have decelerated? mustn't we have decelerated? mustn't you have decelerated? mustn't they have decelerated?	mustn't I have been decelerating? mustn't you have been decelerating? mustn't she have been decelerating? mustn't we have been decelerating? mustn't you have been decelerating? mustn't they have been decelerating?